Fig. 3

Calibration plot (N = 1752) of the developed prognostic model with loess smoother. The distribution of the estimated probabilities is shown at the bottom of the graph, by status relapse within 2 years (i.e. events and non-events). The horizontal axis represents the expected probability of relapsing within the next 2 years and the vertical axis represents the observed proportion of relapse. The apparent performance measures (c-statistic and c-slope) with their correspondent 95% CI are also shown in the graph